Graphite and graphene oxide electrodes for lithium ion batteries

Abstract

Graphite oxide (GRO) was synthesized using Hummer's method by oxidation of pure graphite and subsequently converted into graphene oxide (GR) by a chemical conversion method to be used as electrode material in the lithium-ion batteries. Obtained materials were characterized using X-ray diffraction, scanning electron microscopy, transmission electron microscopy and Raman spectroscopy. Transmission electron microscopy results reveal cloth-type structure of GRO and GR with a thickness of 10nm. The specific discharge capacity of GRO electrode on stainless-steel mesh is 759.4mAh/g at a current density 100mA/g and 796.2mAh/g at 50mAh/g; on copper mesh 940mAh/g at current density 50mA/g and 825mAh/g at 100mA/g With a GR electrode on stainless-steel mesh a capacity of 897.7mAh/g at 50mA/g and 786.9mAh/g at 100mA/g and on copper mesh 824mAh/g and 790mAh/g at current densities 50 and 100mA/g were obtained.